Jquery is a method that checks whether an input checked control is selected

Jquery checks if the input checked control is checked

Js part

 
function tongyianniu(){ 
var gouxuan=$('input[type=checkbox]').is(':checked'); 
alert(gouxuan); 
} 

HTML part

 
<input type="button" id="btnRegister" onclick="tongyianniu();" value=" test " />